Heating-jacket for carbureters.



c1-[6. ERICKSON. Y HEATING IA'CKET FOR CARBURETEHS.

s APPL lATlO N FIL'ED JAN-12| 1915- Patented Nov, 20, 1917.,

2 Sl'HiETS--SIHEETA l.

OSCAR G. ERICKSON, F DETROIT, MVIGHIGAN.

HEAT'INGJACKET ron CARBURETERS.

l speeiaanon of Letters raient. Patented Nov. 20, 1917.

v Application filed January 12, 1915. Serial No.. 1,782.

To all 'whom t may concern:

. Be it known that I, OSCAR G. ERICKSON, a citizen of the United States, residing .at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Heating-Jackets for Carbureters, of which the following is a specification.

My present invention relates to new, and useful improvements in heating jackets or casingsfor carbureters, the primary object of -my invention being'the provision of a heating jacket particularly adapted for use Y. Y with Bayfield carbureters.

A further object of my invention consists in the'provision of a two-part Casin@ or jacket, the parts of which, when assembled,

Vinclose the greater portion of the'carbureterincluding the auxiliary air intake and the main air intake, the casing sections having mating or opposed flanges which en- I gage throughout a portion of their length against each other and 'throughout the re` mainder of their extent aga-inst certain walls ofthe carbu'reter proper.

Av still further object of my invention is to provide a casing of thev above described character which shall conformto the supericial contour of the carburcterto which it is applied and at the same time provide ample space for circulation' of the heated air.

In this connectionl provide means for regulating 'the temperature ot' the air admitted to the casing and a further object ot' my invention consists in sol constructing the parts of the casing as lto permit them to detachably engage about the end of t .e hot air supply pipe, thereby avoiding'the necessity of a threaded or similar connection between the pipe, and casing.

A still further object ofmy invention'con- -sists in constructing the in such a mannerthat they `may be lirmly parts of the casing secured to each otherv and` to the carbureter by `the employment of a few clamp screws, the casing sectlons bemg so formed that they will not bc seriously displaced with respect tothe carburetor, even by loosening ofthe.

Screws.

subject matter of my present which are attached to and form .a part of i f this application.

In the drawings:

Figure 1 is a fragmentaryelvational View of a carbureter, showing my improved heatlng jacket or casing applied thereto;

Fig. 2 is'a similar view, showing one casing section removed to illustrate certain details in the casing construction and also showing the air controlling-valves and air pipe in section; v

Fig. 3 -is a perspective view of the two casing sections removed iiro'm the carbureter;

. Fig.4 is a View corresponding to Fig. 1, illustrating ,a somewhat modified form of casing construction;

Fig. 5 is a perspective view of one of the casing members employed in the construction shown in Fig. 4.

Corresponding and like .parts are referred to in the following. description and indicated in all the views of the drawings by the same reference characters.

The heating jacket or casing forming the invention is pr1marily intended Afor use upon a carbureter of the type conventionally shown at 10 which includes an intermediate mixing chamber 11, a float chamber 12 disposed at one side ofthe mixing chamber, andan auxiliary air inlet valve mechanism 13 disposed at the opposite side of the mixing chamber, these three portions being in alinement with each other. As shown, the chambers 11 and 12 are connected by a reduced throat or pas'- sa ge 14 andthe'portions 11 and v13 are similarly connected as shown at 15. A gasolene supply nipple 1G they tioat chamb r 1:2, thisv chamber being leads into the bottom of also provided with a drain 'plug 17.` The chamber which houses the auxiliary valve mechanism is-valso 'provided with a drain cock 18. It, will of coursebe understood that the carbureter, .above described, does not constitute any 'part of, my invention,

but a slight understanding of its construction is necessary to fully understand the construction and application of my heating jacket. 1

My improved heatingy jacket. indicated as a whole by the ntuncral 1t), includes two symmetrically formed "asino," sections V:20 and 21 these sections beingv formed in lefts and rights, as will be readily understood from an inspection of Fig'. 3. Each of these sections is preferably cast or formed from a Vsingle piece ot metal, such as aluminum or brass-and each includes terminal float chamber and auxiliary air valve mechanism inclosing portions 22 and 253, an inter- Amediate 'mixing chamber inclosintgportion 24 and portions 25 and )tl connectingr the portions and 23m-2l. respectively.

Each ot' the portions 22, Il and lot cach casing section is substantially semi-cylindrical'in general shape, havingl a radius of curvature somewhat greater than the radius of curvature. ot the corrcsl'nnnlingn carburetcr sections. Cach easing section is provided at its upper edge. with an inwardly eX tending llange 2T and at its lower edge with an inwardly directed flange 25H. the ends of these flanges being' parallel to each other. While the intermediate portions converge toward the end portion 2;) ot' the casing. which end portion is considerably less in height than the end portion 2:5. These flanges 27 and 28 in ellect 't'orm the top and bottom walls oi the heatingy facket and ein gage either against the walls ot' thetcorresponding .portions ot the carbureter or against each other.

That portion ot the lower flange 251.', carried by the portion 22 ot the casing, is cutaway as at 29 to engage about the nipple ttl of the float 'chamber and tht` flange 28, adjacent its opposite end, is similarly eut-away at 30 to engage about the lower cylindri :al terminal ci the housing inelosinc the auxiliary valve mechanism. The tlange 2S, adjacent the portion 25 ot' the casing, is also cutaway as at 31 to engage about the drain plug 17 of the carbureter, thel remaining freev edge portions of the flange 2S lyinr in a common vertical plane which, when the ,casing is applied to theI carbureter, extends longitudinally beneath the carburetcr and centrally Y thereof. The. upper lianle. 27 of each sec tion is cut-away arcuately as shown at 32 and 38 to engage about the upper portions ot' the float chamber l2 and Innung chamber 1l1 respectively, the flange between these por- 'tions engagingf at its free-edge against the connecting;` portion ll ot' the carburetor. The flange 27 of each section extends over the upper end ot' the carbureter section 13, being spaced thereabove and the free edges of said portions of the casing flanges 27 engage against each other when the casing is link 4S in such amanner that ai warmes assembled. Those portions of the flanges 27 55 flanges 28 below the mixing chamber are` provided with downwardly depending mati ing` ears 37 to receive further clamping bolts. The casing sections at their opposite ends, are cut-away arcuately as shown at 38 to provide a circular opening communicating with the interior of the casing or jacket when 'the sections are assembled and adjacent such opening with oppositely vdisposed mating ears 3S) to receive furtherstamping screws 37.

, As a means vt'or supplying heated air to l the. casing. lllprovide an intake pipe preferably in the -lorm ot' a 'l"sliaped pipe conpli'ng 40. one branch ll ot' which is proportioned to be clampingly engaged in the opening formed by the cut-away portions 8S, another brauch l2 of which is adapted to comnninieatc with the open air and the other branch l2-l ot which is adapted to conn'nunh cate with a pipe, not' shown, leading from a. heating: jacket about the, exhaust manifold ot' an engine.v 'A butterfly valve 44 is mounted in the branch 41 oi this coupling to conl trol the amount ot' air admitted tothe heating jacket and butterfly valves t5 and l-- are mounted in the branches 42 and 42:5. respectively, of the coupling, The valve levers +7 of the valvesl l5 and -lt are connect d by a t'iiibor lise z complete opening of one valve wil corresponding closing of the other, one icing fully open when the other is fullyxfclt-i ,Any suitable mechanism. not'sliowifr,l ,l L lead from the da'sh of the vehicle to one of the valve levers vi7 and to the valve lever ot' the valve 44 to' permit manual adjust-ment of the valves. This mechanism should, however` permit adjustment of the valve 44 indepemlently ol the valves 45 and 4G.'

ln operation, the casing sections 2t) and 21 are positioned about the carbureter in the manner shown in Figs. l and 2 ofthe d awings and secured in place by' claimtv cre s 3G. lt' the carbureter castinggis'rotiih.l i; irregular, cement or strips of liber packing may be interposed between the ends of the casimgr sections and between the. edges of their flanges and the body of the carbureter to insure absolutely air tight joints. When the easing is so applied, it will be clear that ously described' and any further explanatiom 'mixing-chamberswill be heated, but all air supplied to the Acarbureter will be supplied ,through the coupling 4:0.v By adjusting the .valves in the manner shown in Fig. 2, all the air supplied 'Will behighly heated and by reverse adjustment of the valves 45 and46 cold air alone may be supplied, it of course being apparent that air at any temperature,

only as much hot air can be drawn into the that portion of the carburetor casing inclos between these extremes, may be supplied by proper intermediate adjustment of the valves.

-It should be noted that all the hot air en-V tering the heating jacket isdrawn through the carbureter and employed in the forma'- tion of the explosive mixture. Therefore,

jacketr as can be used by the carbureter Aand it is, therefore, important that the chamberl or space'between the heating jacket and carbureter have the smallest possible volume, providing a sufficient layer or blanket of hot air is provided around the carburetor', `in'order that the ,circulation of hot air through 'the chamber may baas rapid as possible so that the carbureter will be raised to the highest possible heat. In other words, itV the chamber is unduly large, theair will be drawn into it slowly, and Will be cooled both'in its passage from the source of supply to the jacket and while in the jacket, with the result that the carbureter will not be as efficiently heated and will draw in cooler air.

In Figs. 4 and 5, Ihave illustrated a somewhat modified t'orm of. construction including a casing 49 in the forml of two mating sections 50. In this form. the heating jacket or casing incloses the mixing chamber and ing the auxiliary air valvevmechanisin, the fioat chamber "being left exposed. The branch. 4l of the T-shaped coupling 40, in this instance, is inserted in aiia-nged opcn ing` 52 formed in that vportion of one of.

the casing sections which engages about the mixing chamber. Aside from the above tinctions, the form of casing illu'stratedin Figs. 4i and 5 is identical with that previof its construction and operation is,vthere Lto're. beiieved to be unnecessary.

Havinothus described the invention7 what is cinismo as new is: v

l. di .iicating jacket for earburcters ,in elnding mating scctions'of greater 'height at one end thanthe other and conforming-to and adapted to embrace opposite sides ot the carburetor, each vsection including semi-l cylindrical portions and intermediate' portions'connecting said scmifcyiindrical porl tions, the semi-cylindrical and intermediate portions all having upper and lower tianges which space the side walls of said sections a relatively short distance from the carbureter to form'. an intermediateconstricted heating chamber', parts of said upper flanges 'being thickened for 'wedging engagement With the adjacent portion of the carbureter, the large end of the jacket being closed and the .small end thereof provided with an opening, an air intake pipe'fitting'within said opening, and means clamping the sec- 2. A vheating jacket for carburetersincluding mating sections conforming to and adapted to embrace the oppositev sides of a carbureter, cach section of the jacket being 'provided with inwardly projecting upper and lower flanges extending the entire,

length thereof which space the side walls of the sections from the'carbureter to form an intermediate constricted heatingcham-` ber, the upper flanges being disposed at an angle to the lowerA fianges, the front end of the jacket being: closed and the rear end 'thereof provided with an opening, an air intake pipe fitting within said opening, a

perforated lug .extending longitudinally from cach sectio'not the jacket at the closedl end-thereof, upper and lower perforated lugs extending in a verticalplane from Aeach section at-'the opening in the jacket, an inaol loo

termerliatc perforated lug projecting' from 'I the bottom ot'each jacket section, and fastening'devices extending through t e perforations in lall of the lugs for clamping" the.

sections 'ot' the jacket .in assembled position around 4the carbureter and, in con-tact' with the intake pipe, that portion ot'the jacket between the opening and the closed endthereof being adapted-to extend for a portion only ofthe height ofthe .side Walls of' l the carburetorto permit of adjustment of the saidearbureter without removing the `jacket..

A. heating jacket for carbureters'includingw a sectional body, the sections of g and air intake, of a. carburetor, the' body beot' heated air at the part most remote tron carbureter whereby the heatedair admitted which are adapted to vbeclamped together. -to secure it, to vand ,inciose the float chamber will be swept over all portions of a can bnreter in'closed in the body and tliebody being lfurther shaped and proportioned vto p'ro'\-'ide,-with a. carbureter, aninterme'diate hot air chamber which will maintain a hot ing 'formed with an opening for admission .12@

.nir blanket of substantially uniform thickn an engine, will loe attained `to insure the ness completely sui-rounding all inclosed highest heating of the carbureter. 10

carburetor pol-tions whereby, for the thiek.- ln testimony whereof affix my signature ness of theujv blanket provided, the volume in presence of two Witnesses. of the chamber will be reduced to a mini- OSCAR G. ERICKSON. mum so thnt'the maximum rate of air cirlWtneSses: culation through the chamber, caused by PAUL J. BROWN,

the limited suction through a eaibureter by L. F. 1WARD. 

